CN107462777A - A kind of system and method for being used to carry out multichannel power frequency electric field measurement under high humidity conditions - Google Patents

Abstract

The invention discloses a system for measuring multi-channel power frequency electric field under high humidity conditions. The system includes: at least one electric field measurement unit, the electric field measurement unit includes a capacitive sensor, a measurement circuit and a housing, and the capacitive sensor and the measurement circuit are installed in a closed shell, which is filled with liquid insulating material and solidified; the capacitive sensor is used to measure the electric field components in three directions perpendicular to each other at the same time, and obtain the electric field intensity at the measurement site; the electric field measurement unit passes The wireless communication unit sends the electric field intensity data to the host computer; the host computer receives and displays the electric field intensity data sent by at least one electric field measurement unit. This application proposes a multi-channel power frequency electric field measurement system and method using wireless communication, which can reduce the impact of high humidity environment, realize multi-point, high-precision measurement of power frequency electric field, and the measurement can be synchronized.

Description

A system for multi-channel power frequency electric field measurements under high humidity conditions and method

technical field

The present invention relates to electric field measurement technology, more specifically, to a system and method for multi-channel power frequency electric field measurement under high humidity conditions.

Background technique

The power frequency electric field strength is the main parameter for the monitoring and evaluation of the electromagnetic environment in AC power transmission and transformation projects. The existing technology mostly uses a suspension type power frequency electric field measurement device for the power frequency electric field measurement. The principle of the device is to use a bipolar plate suspension capacitive coupling The two plates of this sensor are suspended to the ground, and the follow-up circuit uses a differential method to process the output signal of the sensor, and calculates the relevant electric field strength value by measuring the induced current of the capacitive piece. The capacitor is usually air-isolated between two metal plates or a double-sided PCB board is used. The two-layer metal material sampled is directly exposed to the air. When the air humidity is greater than 65%, due to the Leakage current increases, which greatly increases the error of electric field measurement, sometimes even reaching more than 2 times the real field strength, which brings great troubles to the measurement and evaluation of electric field. When the humidity is high, ordinary supports such as wooden materials are also insulated due to moisture. The performance degradation causes the leakage current to increase, which in turn causes the measurement error to increase. However, in actual use, due to the limitations of on-site conditions, many monitors conduct tests after rain, in light rain, or under conditions of high relative humidity, resulting in measurement results that deviate from the normal range, causing unnecessary misunderstandings and even environmental disputes. Existing devices are difficult to meet the needs of applications under high humidity conditions.

The current electric field measurement generally uses optical fiber communication, which can only be measured one-to-one. The position of the host and the probe needs to be moved at the same time during the measurement. When the optical fiber is short, the measurer is likely to cause electric field distortion. When the optical fiber is long, it is very easy to wind and move the optical fiber. damage.

Therefore, a technology is needed to realize the measurement of multi-channel power frequency electric field under high humidity conditions.

Contents of the invention

The invention provides a system and method for measuring multi-channel power frequency electric field under high humidity conditions to solve the problem of how to measure multi-channel power frequency electric field under high humidity conditions.

In order to solve the above problems, the present invention provides a system for multi-channel power frequency electric field measurement under high humidity conditions, the system comprising:

At least one electric field measurement unit, the electric field measurement unit includes a capacitive sensor, a measurement circuit and a casing, the capacitive sensor and the measurement circuit are installed in the closed casing, and the casing is filled with a liquid insulating material and solidify; the capacitive sensor is used to measure the electric field components in three directions perpendicular to each other at the same time, and obtain the electric field strength at the measurement site; the electric field measurement unit sends the electric field strength data to the upper position through the wireless communication unit machine;

The host computer receives and displays the electric field intensity data sent by the at least one electric field measuring unit.

Preferably, the capacitive sensor is used to simultaneously measure electric field components in three directions perpendicular to each other to obtain three-dimensional electric field intensity components.

Preferably, the liquid insulating material may be epoxy resin liquid.

Preferably, the system includes a bracket on which the at least one electric field measuring unit is installed; the bracket is made of insulating and waterproof material, and the height of the bracket can be adjusted.

Preferably, the bracket can be made of solid plexiglass, and the surface of the bracket is coated with waterproof and antifouling materials.

Preferably, the wireless communication unit includes a wireless communication module or a wireless network operator communication module.

According to another aspect of the present invention, provide a kind of method for carrying out multi-channel power frequency electric field measurement under high humidity condition, described method comprises:

Insulating and curing at least one electric field measuring unit, including: installing the capacitive sensor and the measuring circuit in the closed casing, filling the casing with a liquid insulating material and solidifying;

The capacitive sensor is used to simultaneously measure the electric field components in three directions perpendicular to each other to obtain the electric field intensity at the measurement site;

Using the electric field measurement unit to send the electric field intensity data to the host computer through the wireless communication unit;

Using the host computer to receive and display the electric field intensity data sent by the at least one electric field measurement unit.

Preferably, the capacitive sensor is used to simultaneously measure electric field components in three directions perpendicular to each other to obtain three-dimensional electric field intensity components.

Preferably, the liquid insulating material may be epoxy resin liquid.

Preferably, the at least one electric field measurement unit is installed on the support; the support is made of insulating and waterproof material, and the height of the support can be adjusted.

Preferably, the bracket is made of solid plexiglass, and the surface of the bracket is coated with waterproof and antifouling materials.

Preferably, the wireless communication unit includes a wireless communication module or a wireless network operator communication module.

The technical solution of this application provides a system for multi-channel power frequency electric field measurement under high humidity conditions. The system includes at least one electric field measurement unit. The electric field measurement unit includes a capacitive sensor, a measurement circuit and a housing. The capacitive sensor and the measurement circuit are installed in a closed casing, which is filled with liquid insulating material and solidified; the capacitive sensor is used to measure the electric field components in three directions perpendicular to each other at the same time, and obtain the electric field intensity at the measurement site; the electric field measurement unit passes The wireless communication unit sends the electric field intensity data to the host computer; the host computer receives and displays the electric field intensity data sent by at least one electric field measurement unit. The technical solution of this application proposes a multi-channel power frequency electric field measurement system and method using wireless communication, which can reduce the impact of high humidity environment, realize multi-point, high-precision simultaneous measurement of power frequency electric field, and solve the problem of existing measurement devices The wired communication connection is complex, the test probes are few, the test distance is short, and the measurement time cannot be completely synchronized.

Description of drawings

A more complete understanding of the exemplary embodiments of the present invention can be had by referring to the following drawings:

Fig. 1 is a kind of system structure diagram for carrying out multi-channel power frequency electric field measurement under the condition of high humidity according to the embodiment of the present invention;

Fig. 2 is an internal structure diagram of a system for multi-channel power frequency electric field measurement under high humidity conditions according to an embodiment of the present invention;

Fig. 3 is a flow chart of a method for performing multi-channel power frequency electric field measurement under high humidity conditions according to an embodiment of the present invention.

detailed description

Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units/elements are given the same reference numerals.

Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or overly formal meanings.

FIG. 1 is a structural diagram of a system for multi-channel power frequency electric field measurement under high humidity conditions according to an embodiment of the present invention. The embodiment of the present application provides a system 100 for multi-channel power frequency electric field measurement under high humidity conditions. The system 100 includes at least one electric field measurement unit 101-1, 101-2...101-n, and the electric field measurement unit passes The wireless communication unit 102-1, 102-2 sends the electric field intensity data to the host computer 103; the host computer 103 receives and displays the electric field intensity data sent by at least one electric field measurement unit. The embodiment of the present invention proposes a multi-channel power frequency electric field measurement system and its device using wireless communication, which can reduce the impact of high humidity environment, realize multi-point, high-precision synchronous measurement of power frequency electric field, and solve the problem of existing The measurement device adopts wired communication to connect complexly, there are few test probes, the test distance is short, and the measurement time cannot be completely synchronized. As shown in Figure 1, the system 100 includes:

At least one electric field measuring unit 101-1, 101-2...101-n, electric field measuring unit 101-1, 101-2...101-n including capacitive sensor, measuring circuit and housing, capacitive sensor and measuring circuit installed In a closed casing, the casing is filled with a liquid insulating material and solidified; the capacitive sensor is used to simultaneously measure the electric field components in three directions perpendicular to each other to obtain the electric field intensity at the measurement site; the electric field measurement unit 101-1, 101 -2...101-n sends the electric field intensity data to the host computer 103 through the wireless communication unit.

Preferably, the system 100 includes a bracket on which at least one electric field measurement unit is installed; the bracket is made of insulating and waterproof material, and the height of the bracket can be adjusted.

Preferably, the bracket is made of solid plexiglass, and the surface of the bracket is coated with a waterproof and antifouling material.

The system 100 of the embodiment of the present application is suitable for multi-channel power frequency electric field measurement under high humidity conditions, and includes at least one fully cured electric field measurement unit 101-1, 101-2...101-n, one retractable bracket and one The upper computer 103; the electric field measurement units 101-1, 101-2...101-n and the upper computer 103 adopt wireless communication, and the electric field measurement units 101-1, 101-2...101-n are placed on the retractable support, and used For the measurement of electric field strength in space, the capacitive sensors and processing circuits for collecting signals in the electric field measuring units 101-1, 101-2...101-n are completely isolated from the air after the liquid insulating material is solidified, and the bracket is made of high-performance insulating material and Brush with waterproof and stain-resistant paint.

Preferably, the host computer 103 can not only perform one-to-one testing with a single electric field measuring unit, but also communicate with multiple electric field measuring units through wireless communication to realize multi-point simultaneous testing.

Preferably, the liquid insulating material is an epoxy resin liquid. Preferably, the capacitive sensors and processing circuits for collecting signals in the electric field measurement units 101-1, 101-2...101-n are completely isolated from the air after the liquid insulating material is solidified, and the bracket is made of high-performance insulating material and brushed with water and dirt resistance coating.

Preferably, the capacitive sensor is used to simultaneously measure electric field components in three directions perpendicular to each other to obtain three-dimensional electric field intensity components.

The host computer 103 receives and displays the electric field intensity data sent by at least one electric field measuring unit 101-1, 101-2...101-n. Preferably, in the power frequency electric field measurement system, the host computer 103 can simultaneously display the three-dimensional component and total results.

Preferably, the wireless communication unit includes a Si4463 wireless communication module or a wireless network operator communication module. In this application, when the measurement distance is less than 2km, the system 100 uses wireless modules such as Si4463 for wireless communication, and when the distance is greater than 2km, the operator's communication network is used.

Preferably, the power frequency electric field measurement system 100 not only can have one host computer 103 correspond to one electric field measurement unit 101-1 to realize one-to-one measurement, but can also simultaneously communicate with multiple electric field measurement units 101-1 through one host computer 103. 1, 101-2...101-n conduct wireless communication to realize one-to-many synchronous measurement.

Preferably, the measurement system 100 distributes a plurality of power frequency electric field measurement units 101-1, 101-2...101-n in different areas, and each electric field measurement unit 101-1, 101-2...101-n has a different address coding; when the host computer 103 issues a data preparation upload command through a broadcast command, all the power frequency electric field measurement units 101-1, 101-2...101-n pack the current measurement data, and the host computer 103 sends the data by polling After the upload command, each electric field measurement unit 101-1, 101-2...101-n uploads the measurement data to the host computer 103 through wireless communication after receiving the upload command from the host computer 103.

After the upper computer 103 receives the measurement data, it first displays the measurement data in real time, and uploads the test results to the computer. The computer displays the measurement results of different measurement points in real time. The computer program can store the data and output statistical results. The host computer 103 can also be connected with a computer to store and analyze data.

Fig. 2 is an internal structural diagram of a system for performing multi-channel power frequency electric field measurement under high humidity conditions according to an embodiment of the present invention. As shown in Figure 2, 1 and 3 are solidified insulating materials, 2 is a capacitive sensor, and 4 is a measurement circuit board. The electric field measurement unit uses a three-axis capacitive sensor inside, which can simultaneously measure the electric field components in three directions perpendicular to each other, and obtain the total electric field through the square and root.

The capacitive sensor and processing circuit inside the electric field measurement unit of the embodiment of the application are completely isolated from the air after the liquid insulating material is solidified, and the bracket is made of high-performance insulating material and painted with waterproof and stain-resistant paint. It can reduce or even eliminate the influence of humidity changes on power frequency electric field measurement, and is suitable for power frequency electric field measurement under different humidity conditions. Since the current electric field measurement generally uses optical fiber communication, it can only be measured one-to-one. When measuring, it is necessary to move the position of the host and the probe at the same time. When the optical fiber is short, the measurer is likely to cause electric field distortion. easily damaged. The device adopts wireless communication between the electric field measurement unit and the host, eliminating the need for connecting wires, making it very convenient to adjust the measurement layout and the position of the measurement points, greatly improving the work efficiency and reducing labor intensity, and can meet the needs of ultra-long distance and multi-point Power frequency electric field test needs.

The implementation mode of the present application adopts full digital display, has a friendly man-machine interface, and can measure power frequency electric field intensity conveniently, effectively and accurately. This application can realize multi-unit, high-precision synchronous measurement of power frequency electric field strength, greatly reduce the influence of humidity on power frequency electric field measurement, and provide an important basis for AC power transmission and transformation projects, especially the monitoring, evaluation and control of power frequency electric field strength . The implementation mode of the present application can be applied to the monitoring, environmental protection acceptance and research of the power frequency electric field in the field of AC power transmission and transformation engineering in the future, and has high promotion value and wide application prospect.

Fig. 3 is a flow chart of a method for performing multi-channel power frequency electric field measurement under high humidity conditions according to an embodiment of the present invention. As shown in Figure 3, method 300 includes:

Preferably, in step 301: insulating and curing at least one electric field measurement unit, including: installing the capacitive sensor and the measuring circuit in a closed casing, and filling the casing with a liquid insulating material and solidifying. Preferably, the liquid insulating material is an epoxy resin liquid.

Preferably, at least one electric field measurement unit is installed on the bracket; the bracket is made of insulating and waterproof material, and the height of the bracket can be adjusted. Preferably, the bracket is made of solid plexiglass, and the surface of the bracket is coated with a waterproof and antifouling material.

Preferably, in step 302: the capacitive sensor is used to simultaneously measure the electric field components in three directions perpendicular to each other to obtain the electric field intensity at the measurement site.

Preferably, in step 303: using the electric field measurement unit to send the electric field intensity data to the host computer through the wireless communication unit. Preferably, the wireless communication unit includes a Si4463 wireless communication module or a wireless network operator communication module.

Preferably, in step 304: using the host computer to receive and display the electric field intensity data sent by at least one electric field measuring unit.

Preferably, the capacitive sensor is used to simultaneously measure electric field components in three directions perpendicular to each other to obtain three-dimensional electric field intensity components.

A method 300 for performing multi-channel power frequency electric field measurement under high humidity conditions according to an embodiment of the present invention and a system for performing multi-channel power frequency electric field measurement under high humidity conditions according to another embodiment of the present invention 100 corresponds, and will not be repeated here.

The invention has been described with reference to a small number of embodiments. However, it is clear to a person skilled in the art that other embodiments than the invention disclosed above are equally within the scope of the invention, as defined by the appended patent claims.

Generally, all terms used in the claims are to be interpreted according to their ordinary meaning in the technical field, unless explicitly defined otherwise therein. All references to "a/the/the [means, component, etc.]" are openly construed to mean at least one instance of said means, component, etc., unless expressly stated otherwise. The steps of any method disclosed herein do not have to be performed in the exact order disclosed, unless explicitly stated.

Claims (12)

1. A system for carrying out multi-channel power frequency electric field measurements under high humidity conditions, said system comprising: At least one electric field measurement unit, the electric field measurement unit includes a capacitive sensor, a measurement circuit and a casing, the capacitive sensor and the measurement circuit are installed in the closed casing, and the casing is filled with a liquid insulating material and solidify; the capacitive sensor is used to measure the electric field components in three directions perpendicular to each other at the same time, and obtain the electric field strength at the measurement site; the electric field measurement unit sends the electric field strength data to the upper position through the wireless communication unit machine; The host computer receives and displays the electric field intensity data sent by the at least one electric field measuring unit. 2 . The system according to claim 1 , wherein the capacitive sensor is used to simultaneously measure electric field components in three directions perpendicular to each other to obtain three-dimensional electric field intensity components. 3. The system of claim 1, the insulating material being a liquid-to-solid insulating material. 4. The system according to claim 1, comprising a bracket on which the at least one electric field measuring unit is installed; the bracket is made of insulating and waterproof material, and the height of the bracket can be adjusted. 5. The system according to claim 4, said bracket is made of solid plexiglass, and the surface of said bracket is coated with waterproof and antifouling material. 6. The system according to claim 1, the wireless communication unit comprises a Si4463 wireless communication module or a wireless network operator communication module. 7. A method for carrying out multi-channel power frequency electric field measurements under high humidity conditions, said method comprising: Insulating and curing at least one electric field measuring unit, including: installing the capacitive sensor and the measuring circuit in the closed casing, filling the casing with a liquid insulating material and solidifying; The capacitive sensor is used to simultaneously measure the electric field components in three directions perpendicular to each other to obtain the electric field intensity at the measurement site; Using the electric field measurement unit to send the electric field intensity data to the host computer through the wireless communication unit; Using the host computer to receive and display the electric field intensity data sent by the at least one electric field measurement unit. 8. The method according to claim 7, wherein the capacitive sensor is used to simultaneously measure electric field components in three directions perpendicular to each other to obtain three-dimensional electric field intensity components. 9. The method of claim 7, the liquid insulating material being an epoxy liquid. 10. The method according to claim 7, wherein said at least one electric field measurement unit is installed on said bracket; said bracket is made of insulating and waterproof material, and the height of said bracket can be adjusted. 11. The method according to claim 10, wherein the support is made of solid plexiglass, and the surface of the support is coated with a waterproof and antifouling material. 12. The method according to claim 7, the wireless communication unit comprises a wireless communication module or a wireless network operator communication module.